首页|CO2-Induced Modulation of Si-O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence

CO2-Induced Modulation of Si-O Bonds for Low Temperature Plastic Deformation of Amorphous Silica Nanoparticles with Enhanced Photoluminescence

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Modulation of Si-O bonds under mild conditions has been a challenging issue in the field of material science,which is critical to manufacture high-performance silica-based optical and photonic devices.Herein,we introduce a nondestructive technique to achieve Si-O bond rearrangement,leading to plastic deformation and photoluminescence enhancement of amorphous silica nanoparticles using supercritical carbon dioxides in EtOH/H2O solution under mild temperature.Specifically,plastic deformation is achieved by treating hollow mesoporous silica nanospheres using supercritical CO2 at 40 ℃ under 20 MPa.Experimental and theoretical studies revealed the critical role of supercritical CO2 in the plastic deformation process,which can be intercalated into the hollow mesoporous silica nanospheres with anisotropic stresses and induces the rearrangement of Si-O bonds and transformation of ring structures.This work suggests a novel approach to engineer high-performance nano-silica glass components for numerous optical and photonic devices under mild condition.

amorphous silicaanisotropic stressphotoluminescenceplastic deformationsupercritical CO2

Kang Huang、Wenzhuo Wu、Song Xu、Pengfei Yan、Zhongming Wei、Qun Xu

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Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,China

College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of Chinajoint project from the Henan-ProvincialChina-National Natural science Foundations

511731702170320721773216U2004208

2024

10.1002/eem2.12655

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(4)